Why Is Micron (MU) Stock Price Up 6.10% Today, Sep 4? AI Memory Demand and Bullish Cycle Upgrade Spark Surge

Micron rallied ~6% as AI-infrastructure optimism and a broader memory-sector repricing reinforced expectations of tight HBM/DRAM supply and resilient demand. The move appears driven more by sector sentiment and AI spend read-through than company-specific news, increasing near-term sensitivity to confirmation from memory pricing, shipment trends, and upcoming earnings. A failure to sustain the rebound would likely shift focus back to underlying order and margin evidence.